CH136255A - Process for the preparation of an o-oxyazo dye. - Google Patents

Process for the preparation of an o-oxyazo dye.

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Publication number
CH136255A
CH136255A CH136255DA CH136255A CH 136255 A CH136255 A CH 136255A CH 136255D A CH136255D A CH 136255DA CH 136255 A CH136255 A CH 136255A
Authority
CH
Switzerland
Prior art keywords
dye
oxyazo
preparation
acid
proof
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH136255A publication Critical patent/CH136255A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung eines     o-Oxyazofarbstoffes.       Es wurde gefunden, dass man neue     o-          Oxyazofarbstoffe    erhält, die wertvolle, durch  ihr     Egalisierungsvermögen    ausgezeichnete       Beizenfa.rbstoffe    von vorzüglichen Echtheits  eigenschaften sind, wenn man     o-Oxydiazo-          verbindungen    mit 2. 8 -     Dioxynaphthalin    - 6.       carbonsäure,    zweckmässig in alkalischer Lö  sung, kuppelt.  



  Die     bisher    unbekannte 2- 8 -     Dioxynaph-          thalin-6-carbonsäure    erhält man durch     Sul-          fieren    der 2 . 6 -     Naphtholcarbonsäure    und       Alkalischmelze    der so erhaltenen     2-Naplithol-          8-su@lfo-6-ca,rbonsäure.     



  Vorliegendes Patent bezieht sich nun  auf die Darstellung eines     o-Oxyazofarbstoffes     durch Kombination von dianotierter     Pikramin-          säure    mit 2. 8 -     Dioxynaphthalin    - 6 -     carbon-          säure.     



  Trocken     ist    der Farbstoff ein schwärz  liches Pulver. löslich in konzentrierter  Schwefelsäure mit bläulich roter Farbe;    er färbt Wolle in sehr gleichmässigen       violettbraunen    Tönen; durch     Nachchromieren     erhält man ein     walk-    und     pottingechtes          Schwarzgrün.     



  <I>Beispiel:</I>  Man     dianotiert    19,9 Teile     Pikraminsäure     in die üblichen Weise und gibt die     Diazo-          er        lung    zu einer     sodaalkalischen    Lösung  v     'binc     von 21 Teilen 2'.     8-Dioxynaphtha-Iin-6-car-          bons!äure    hinzu. Der Farbstoff wird nach be  endeter     Kupplung        ausgesalzen    und in übli  cher     -Weise    aufgearbeitet.



  Process for the preparation of an o-oxyazo dye. It has been found that new o-oxyazo dyes are obtained which are valuable Beizenfa.rbstoffe, which are excellent due to their leveling capacity, of excellent fastness properties, if one o-oxydiazo compounds with 2. 8 - dioxynaphthalene - 6. carboxylic acid, suitably in alkaline Lö sung, clutch.



  The hitherto unknown 2-8-dioxynaphthalene-6-carboxylic acid is obtained by sulfating the 2. 6 - Naphtholcarboxylic acid and alkali melt of the 2-naplithol-8-su @ lfo-6-ca, rboxylic acid thus obtained.



  The present patent now relates to the preparation of an o-oxyazo dye by combining dianotated picric acid with 2,8-dioxynaphthalene-6-carboxylic acid.



  When dry, the dye is a blackish powder. soluble in concentrated sulfuric acid with a bluish red color; he dyes wool in very even purple-brown tones; by re-chrome plating, a black-green color that is true to walk and potting is obtained.



  <I> Example: </I> 19.9 parts of picric acid are dianotated in the usual way and the diazoic acid is added to a soda-alkaline solution v'binc of 21 parts 2 '. 8-Dioxynaphtha-Iin-6-carboxylic acid added. After the coupling has ended, the dye is salted out and worked up in the usual manner.

Claims (1)

PATENTANSPRQCH: Verfahren zur Darstellung eines o-Oxy- azofarbstoffes, dadurch gekennzeichnet,, dass man die Diazoverbindung von Pikramin- säure mit 2.8-Dioxynaphthalin-6-carbon- säure kuppelt. PATENT CLAIM: Process for the preparation of an o-oxyazo dye, characterized in that the diazo compound of picramic acid is coupled with 2,8-dioxynaphthalene-6-carboxylic acid. Trocken ist der Farbstoff ein schwärz- liches: Pulver, löslich in konzentrierter Schwefelsäure mit bläulich roter Farbe; er färbt Wolle in sehr gleichmässigen violettbraunen Tönen; durch Nachchromieren erhält man ein walk- und pottingechtes Schwarzgrün, UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Kombination in alkalischer Lösung vornimmt, When dry, the dye is blackish: powder, soluble in concentrated sulfuric acid with a bluish red color; he dyes wool in very even purple-brown tones; by re-chrome plating one obtains a mill-proof and potting-proof black-green, SUBClaim: Process according to patent claim, characterized in that the combination is carried out in an alkaline solution,
CH136255D 1926-10-05 1927-09-29 Process for the preparation of an o-oxyazo dye. CH136255A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE136255X 1926-10-05
CH130158T 1927-09-29

Publications (1)

Publication Number Publication Date
CH136255A true CH136255A (en) 1929-10-31

Family

ID=25711382

Family Applications (1)

Application Number Title Priority Date Filing Date
CH136255D CH136255A (en) 1926-10-05 1927-09-29 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH136255A (en)

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